{
  "manageEntity": {
    "action": "Save",
    "entityId": "1007375766",
    "entityType": "Track",
    "nonce": "0x2a64e60dcd9d5084091ad8d9e69ce41f1e823feccad58845defef2ecc30b9b72",
    "signature": "0xb8a8eea63c4ead1556ed41335ec2471e062099889fbb7a0e41e808e03a3e7da75584ee1bb5679f42d8603c9c7e2e1e3469577325b273ed8e8ce16a3e7bb86c9b1b",
    "signer": "0x040629E31a68119093b9a0111257C8449c2f8e10",
    "userId": "20"
  }
}