{
  "manageEntity": {
    "action": "Save",
    "entityId": "896554828",
    "entityType": "Track",
    "nonce": "0xaf38e52db0c2931f41182136186c8ffc65ec889f29a8a72f33fc23f3edd720c1",
    "signature": "0x393fe73f08aa2494439df779030bfb1fdd999253506226d96642df49e42d40184f2fcf2b39f098097964b74eb771f033708ed70e0888b012245c91c96b47e1281c",
    "signer": "0x7b52e6AA15Db4Fc3A84AFF2b12e5B8B128eA8610",
    "userId": "808512351"
  }
}