{
  "manageEntity": {
    "action": "Save",
    "entityId": "1815101300",
    "entityType": "Track",
    "nonce": "0xaf745bd178a082d5b5ef0e95ad6d54c3b0876e149754032e06b1f97c1b7eaab8",
    "signature": "0x6dde0b3213d15f277ff2f67a0c126e923a59cc076e3fefa057a737325e3756154dd22a3f95bd5ce12d92c76664fca0deb990deed7123b04278ca3374b62491ec1b",
    "signer": "0xaFdEC27229de1023f5322f4Dbf0e874dC548011F",
    "userId": "817564020"
  }
}