{
  "manageEntity": {
    "action": "Save",
    "entityId": "839628769",
    "entityType": "Track",
    "nonce": "0x9e0c822d2698e9c11c538df7639d4bec41d56597d96a1eb308e8ae4a35628401",
    "signature": "0x4ecd522e0f5ac3a3ae167a90470f3ec19df17f62afe83500be81310c19a4aa3372e2018764f49680ab8ca6a0a7c93f1d317029de7a601dfdad06a3a7a5173c3e1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}