{
  "manageEntity": {
    "action": "Save",
    "entityId": "1429585929",
    "entityType": "Track",
    "nonce": "0x024c6cc7e1fce2d1c82e7b8745a56cc9a2554e5e77855317f8faaea3317515a6",
    "signature": "0xe348b37b2d9106a593c948ccb1239e1da5bcc67eec853fdbb061cb784507f93a7af7524440d0388954cd50a23b9c4376f23856e2cfa213b884d3245dc4aa710f1c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}