{
  "manageEntity": {
    "action": "Save",
    "entityId": "1679262788",
    "entityType": "Track",
    "nonce": "0xcc03c429941f8dd700133e374b614196234155609ff274f2d439f9e0eab26e83",
    "signature": "0x04338367f4b9ee6251d2ad57af50ec2aa2fe116a82b688931c2222aefde54cdf242c1c41191905719a9d7c4ec186df0dd2adae87d7010252e61a9f25da4f43cc1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}