{
  "manageEntity": {
    "action": "Save",
    "entityId": "739778343",
    "entityType": "Track",
    "nonce": "0xd85c5d7051f0abf8f545c4e38d5dd36c38d98a1991f8d7caa9e646cbb3d3c10c",
    "signature": "0x10938b25b8233b2dad6e895dd58aea2084b4f1e887b04090cde70c7f3888c0ca1bfb007ff8003059fd5eff79611cdd31df5e1345533d4a88b0800a3dc71ad7911c",
    "signer": "0x9d71fCCB64e7575736E44460e714Ce0fcd69cf08",
    "userId": "16198441"
  }
}