{
  "manageEntity": {
    "action": "Save",
    "entityId": "240287",
    "entityType": "Track",
    "nonce": "0x5fb8168bfb3507f1374154412bc1a127aa4f620ee9e3ee2c55b9569a8c7e5273",
    "signature": "0x48ae4f942060e8053821a5d6787b349f275073decb07bde33277ab0479f45b4d0325936af45e0e6428eecb0abe95bcb94266da0178626bd3b3cbf0ea72b560fb1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}