{
  "manageEntity": {
    "action": "Save",
    "entityId": "1765655828",
    "entityType": "Track",
    "nonce": "0x193c9a45b70758edc6ebef4163ca0d6878e3a53c7dc7cb033be938ec61e8d4dd",
    "signature": "0xc7da36f3e6ae925f120a4c258fc6d7b2e689ba8019b710ef9adee4be0a74b74852ffd593af2fdae60418b488f2ab80690fe1efdce5eb4c65df288a479cba4cbe1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}