{
  "manageEntity": {
    "action": "Save",
    "entityId": "1682844904",
    "entityType": "Track",
    "nonce": "0x4b04b1dbf54fa9275c35f310734b96f81b46656c3a50916276c5199b737bf03e",
    "signature": "0xf277f3d55072cd49b82f1a98c37cda274019f68469d4f44c666cc75a568d3ed04ae90754b867c8594476363be65e2f0e34593e3ba0bfd18a7d37230e841d98771c",
    "signer": "0xab28764Bd1224556ebA1d8Bc48d3f1F5D2e4E1dD",
    "userId": "281054123"
  }
}