{
  "manageEntity": {
    "action": "Save",
    "entityId": "658443711",
    "entityType": "Track",
    "nonce": "0x4460aff6e61800dc68744a5359e3943575a19e58f39532ccb06e3990daa86c83",
    "signature": "0x97815ef6bdd467e3d737c60ed0e81ddcad8b0a5d5e1ae6332c0117c42177380d377e12abd7bf8b05b84a4a44b390ba6520b871dd5962b3361b6d6ac3d34a5e2c1b",
    "signer": "0x2B171214e998033E806F72301307B2160CD94DdB",
    "userId": "489165782"
  }
}