{
  "manageEntity": {
    "action": "Save",
    "entityId": "1549852040",
    "entityType": "Track",
    "nonce": "0x118eb05957aeb669cd50e86eb5506f795676c150047cbbdb6f484093bafe5d3c",
    "signature": "0x74d4b911b49766c43ece26a57b50989daa18d2e8e5133f1524c62b4f0c10a7192a361ae236fe2ebaeaf2663348ceb9c403bb31d1909620bec1e082d18253c2611b",
    "signer": "0x0E71C12c426F5C9206F778713f48B60477CA943b",
    "userId": "29088079"
  }
}