{
  "manageEntity": {
    "action": "Save",
    "entityId": "482911",
    "entityType": "Track",
    "nonce": "0xd5da27f43d124bb64452e69d82b7ba0ce2e1cc4b45c3c7560a5df1704a547941",
    "signature": "0x50b2ff94b19c0c2e3d846f08a773b7e6038d7b158869c3a24d4fb501d5f721b449702da0879320a5cc451ae2b60ca8bcc45d9f009b8cb1b3e1243eca8a92a2881b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}