{
  "manageEntity": {
    "action": "Save",
    "entityId": "547627258",
    "entityType": "Track",
    "nonce": "0x3b4e9b90e7aaebf11767aadd244fe383199b1b900c10fd726f8d8a5aae791cc7",
    "signature": "0x55f35422be392ade3d22ecbfb48a2569c3d7f12a2693efd392cc6e669869c88c7efa9d532e97e9d77e2a857195428e02751d203d25a7d36356980c92c0347baa1b",
    "signer": "0x53d8e61f7BdCd69E26B5AAe8F197464091224DB4",
    "userId": "99786"
  }
}