{
  "manageEntity": {
    "action": "Save",
    "entityId": "384892",
    "entityType": "Track",
    "nonce": "0x8f6b976cf00b3db27eff94c940fa43aed623cc135cfbe15e8e34212b1619d7b0",
    "signature": "0x9e357c490610f37d601a0ff04e6e896bb7c9090f17e7c4ac08a152978f1e3dfe268c5c462817e843ac25d7e6273f0934f487b22ed99f74ee2803ebfa18385f951b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}