{
  "manageEntity": {
    "action": "Save",
    "entityId": "800678497",
    "entityType": "Track",
    "nonce": "0x1ee75199c9689fc84c168bb9c457464a805af06182272da6011f8a643270f484",
    "signature": "0xc11861407f9dee494b5062932df7ff0b079a29d11b6b3f075e80d813930099d96c3f085e2554c07abf95257f6e245044b15cae90378e90e82711384a008fcd4f1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}