{
  "manageEntity": {
    "action": "Save",
    "entityId": "297904",
    "entityType": "Track",
    "nonce": "0x636a73768d642f360468c56fd85ede96d9d368d52301e6fb2e69323b7b97d21c",
    "signature": "0xebe86cf1114585e2519efdb5bcb82364bbeef1e99d1e0452ebe5b5edf0d96a6c349233bf0032386784dd1e4212c8ec15e9229f151f1fc1537fedb271ae770b651b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}