{
  "manageEntity": {
    "action": "Save",
    "entityId": "713564502",
    "entityType": "Track",
    "nonce": "0xb9b735dbdfbf10e73d4e7e6a8c6e222b7a20702df4ab44bcc6eb0ab01469b9e0",
    "signature": "0xfcfe47fd286c3f4b8b2cc6aab5b9e452159ac83f82433e6cdb96087c975d7f234798aa1b82e31dc610c597575d407df33fb05910eb8e2d79799a7a4fe2876de71c",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}