{
  "manageEntity": {
    "action": "Save",
    "entityId": "1522676220",
    "entityType": "Track",
    "nonce": "0x3d8093cdb62a5853008eabce7c38b95cff3e01155835dff1f0e8a18d3474fa1c",
    "signature": "0xdfe2920d8bc68fdaf283754a70d1951facd04e9f6f3854c386a19bd4ff3a1e5d03e49131bf92bdca49e438038b1a286a43d5e1def48c8c92630652632db4f06d1c",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}