{
  "manageEntity": {
    "action": "Save",
    "entityId": "619562471",
    "entityType": "Track",
    "nonce": "0x7ae6b80ef4879e1146ded8b6e4230fc03468584b2270c7a5b6a49f696f183381",
    "signature": "0x18fa233138f65edba3bc000b9e42d37f66ba3fcd58c32e24b3bbe43d98d2b1d30e4fafdf913a17aed5cba60566daa2bfe2b6a56ac9832d10e0f2bab5b19f82821c",
    "signer": "0x036B1ee0d2003ae5B5E252d58647d13f0e588EEB",
    "userId": "161353174"
  }
}