{
  "manageEntity": {
    "action": "Save",
    "entityId": "1300470968",
    "entityType": "Track",
    "nonce": "0x365d7e1444ca2093d62b9ac4273a23414a615a3ae94bedede77faf817375b3ed",
    "signature": "0x97a3a28d81102f472096904eb8370379c9d37eef97b8dea63fced835c6f2bf961012c702424e2df73f8274a3a7e19b3e89585ecea32399b8eff89e21c4a17e191b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}