{
  "manageEntity": {
    "action": "Save",
    "entityId": "694732262",
    "entityType": "Track",
    "nonce": "0xcf6a6f5bea1a95d178ea905bfd1935aea58ca59f85c80b56e25eeb074bb14062",
    "signature": "0x5c40d3320ed1a9858e8cbf9af4dc2091ca01eba2e3aa7cf2c11ebda2dbab79667b519d6beeef6c5501f0673bd5df6b6785475a9b548b7fcf7f6adc1d90d210a81b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}