{
  "manageEntity": {
    "action": "Save",
    "entityId": "385035240",
    "entityType": "Track",
    "nonce": "0xb808f0f855902b79f2707eea00501b5f373bc41b2615b9b163718f3525016a3a",
    "signature": "0xa4aba48cacefa7708c8bfacd62a07e4418ecdff63e261643898b77b2fc355fc3683131dcb2e2ae48dfa6fe4e7ce0a63e7f07a4b5e51cbd081967302c55351dfe1b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}