{
  "manageEntity": {
    "action": "Save",
    "entityId": "1634306471",
    "entityType": "Track",
    "nonce": "0xf6e761114f460b077b6592a9d8da559e1ff111f071e76f84683facc399ea3a35",
    "signature": "0x954fab370cfd48bd19bc7a9b664e49a6f6f6e81c3b70312ddc022c21a829902249cc812b6486e9a20571247bb1bf7b417b64f36b9d8be09ee9c479056ef79bde1b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}