{
  "manageEntity": {
    "action": "Save",
    "entityId": "2038574799",
    "entityType": "Track",
    "nonce": "0x768297f7b8a03c1dd7714616851c109cde60fe90013693058dba634f73ff0cf8",
    "signature": "0xfa29816318fc4135c3159c2e72aafd03f84c2f89d3d6d4fcf2ee79390518ffce5140ad836b50f9497b4d47fde9dfac2d17974416b5f1df431b8edc33152301d11c",
    "signer": "0x2d179f6eC2BA69eEbB8aA94b02622BeC225b96D8",
    "userId": "104731774"
  }
}