{
  "manageEntity": {
    "action": "Save",
    "entityId": "380443051",
    "entityType": "Track",
    "nonce": "0x646a85068d2c2efa36fd6edc2ce4f0cc93740309d11a7e67c9d106024b3a03b5",
    "signature": "0xa5ce12240093a6659b45e34ed834023be163a6d51421487f397286a4281521ca0419fea4e72d5ec6e64a5e924b4b4d9e67d7a99b121d4b7321f71499e15496dc1b",
    "signer": "0x036B1ee0d2003ae5B5E252d58647d13f0e588EEB",
    "userId": "161353174"
  }
}