{
  "manageEntity": {
    "action": "Save",
    "entityId": "1258118238",
    "entityType": "Track",
    "nonce": "0xfee3b7fcc3cf9d18626241fe4dd9d55acb3cbd35755ac382adb68949c43c795c",
    "signature": "0xbaa6d804c0b05cbde79411ebb985aa8278a91c7c4f7bc7f6d6c8a983226309ee4590111ca249d22374aef983578a40f32848ea94215034a7e470dac94a81cd871b",
    "signer": "0x2B171214e998033E806F72301307B2160CD94DdB",
    "userId": "489165782"
  }
}