{
  "manageEntity": {
    "action": "Save",
    "entityId": "844591900",
    "entityType": "Track",
    "nonce": "0x20ec679719033ad0451971c10d8a6fb790066f297567f98533f9d7c45fe50560",
    "signature": "0x0c87d89268156356a75cfb888cd8201277e093b084804677ae43b4a3fbf0ee6f177c62c85e6100dda6324b1091d09a679ce51fde6a4cc4fd2a75738493e2061f1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}