{
  "manageEntity": {
    "action": "Save",
    "entityId": "588877181",
    "entityType": "Track",
    "nonce": "0xf0054c67256c094ea5b92cad6a049852eea1ad8f4069a6e6ee98b8739b9aeff7",
    "signature": "0x9486f8e72e39828476f25ea6e49d11790c0bd6d3afa6c74d7990dbb7fafb77d32c35cc53b45a54a0f6c3f9df998e7fc39871acbfe9c1578ef51ee9be385a1e4b1b",
    "signer": "0x53d8e61f7BdCd69E26B5AAe8F197464091224DB4",
    "userId": "99786"
  }
}