{
  "manageEntity": {
    "action": "Save",
    "entityId": "1619210496",
    "entityType": "Track",
    "nonce": "0x63e509a722064a9004560013108140a394810a46e80484c3d84560fa6c78ce46",
    "signature": "0x41736c238821bb3ef76eea76bf9e97ede18af125ee0a7cccde40da5be952ef614691afa9ec203b1745a5a1bcd93ff1016125275a14aca7c70622e5e9014d51091b",
    "signer": "0x94e0dDC50579175818AaCFBC9aba8B065fEf2a55",
    "userId": "460147282"
  }
}