{
  "manageEntity": {
    "action": "Save",
    "entityId": "183655",
    "entityType": "Track",
    "nonce": "0x240702aef2932acea5040e6f1538c55c8274ea190d973f97684d27e85da624d8",
    "signature": "0x435d9e35dc786e7be9d03b8c221b75c011dd8c0aaaac61711bd1605e97d1518b62300e7a670d6d9ba194f937c9a5a5109d7fce39a06bc0da8a1840cbe3a3d7681c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}