{
  "manageEntity": {
    "action": "Save",
    "entityId": "33886164",
    "entityType": "Track",
    "nonce": "0xc0c72fb7a9dbb6b23c3ccca9b0a878b9f4e392d81bb1cbc44db90987ebc25773",
    "signature": "0x91952a89399c421844d8061bc3506bf52465b87d1c0ae2cd5306f061fa3c31193c9038bbbb6dbd92d9425af9232f4122430fc91119676047d00aff289dec0f181c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}