{
  "manageEntity": {
    "action": "Save",
    "entityId": "1867423220",
    "entityType": "Track",
    "nonce": "0xa42a5965482826aae13c1a4091c8253a7cf2f8128f98ec88baa2c501c4b438df",
    "signature": "0x8848cffc8875b739e52ffa08ff4381cfac56ee39103648c1d71bfc2bfa5c667d0b39ab62db31c7d860eec6e3496d7a49882cfb0109b08567a5cb92cb7c6719b91c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}