{
  "manageEntity": {
    "action": "Save",
    "entityId": "1283385217",
    "entityType": "Track",
    "nonce": "0xe7bca0699744bba48afa63891d99341d851a78d6cf30c4594146845dd0cf8873",
    "signature": "0x767e994113bbdb3bcbb8957d4d18d8a78e7dd3b888d2d343f9ee19f51fb038d90496670037f95e27e19753a15ca6d88b03c98022c4b8f895d7028349c4f21a361c",
    "signer": "0x767f09338Ac6CE8645c0a76a17a560429b582132",
    "userId": "520958130"
  }
}