{
  "manageEntity": {
    "action": "Save",
    "entityId": "696727",
    "entityType": "Track",
    "nonce": "0x6ceeeda7d1efd5c8480f2fa6f1eeb2c94b1337997721a9a8e73e19e6a8649c31",
    "signature": "0x010f95e609f2e3cb343289c517b89bf8e58c9c5ab5b9f3020c39f4bb36299ed81b34274ff3e51d343da0dd1108a37efadc7546346aa4357aad10c1aa48733f511c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}