{
  "manageEntity": {
    "action": "Save",
    "entityId": "1010504121",
    "entityType": "Track",
    "nonce": "0x203058a6cfc8c68ff1f7ebcde0b373cecff7e52d5bd0ff2077fe5c8d30be9e88",
    "signature": "0x10ecff5ea466f3c1734b575a06a3e7454a5af0ee8f16fd7d7bdf03f98c9b5a9f119b31a26e88b1e75acbea3471b931f90827068f5a41f38cf18b9d0bdb4df2ed1b",
    "signer": "0x34Cea527C1dc0575a5B686515aad0Bf8F3b5f97E",
    "userId": "13589021"
  }
}