{
  "manageEntity": {
    "action": "Save",
    "entityId": "987145174",
    "entityType": "Track",
    "nonce": "0xa9550d1aea4af17b0bb6f7d03679f69c48a720a28b383286ceb8bcbc54e99e3d",
    "signature": "0x2e9ab6383f30fb7e394e051f991db024e35ecc72bcb8bb53f68ebf918800ab17110b5af737f595bd7de46e4bce9c24b19f19fdcb6c792d50dc5471076be359c01c",
    "signer": "0x88ad765B72fb060B3adbae1FA44A6C64722E1781",
    "userId": "236177"
  }
}