{
  "manageEntity": {
    "action": "Save",
    "entityId": "1222711028",
    "entityType": "Track",
    "nonce": "0xf9267b60ef9d6afcedecb4fa57ddd96b7f1073a8cb7fd262cdac250da0318e0a",
    "signature": "0x0a9d340072dbb71ad120a8f6fb20b6bede16fa2da2d3d368fd9236cb8d2c1c2b02b4ac65d4fd9c5976caee7ca2a2e514b10d3498b425b65dc1502a390dfc616e1c",
    "signer": "0x3324C23609BC25902C39CFa38CF40581c7Bc7F87",
    "userId": "229134011"
  }
}