{
  "manageEntity": {
    "action": "Save",
    "entityId": "1515487147",
    "entityType": "Track",
    "nonce": "0xd3c5c33927aca55b66e96082372b23c0f5240b8ea7683cd5fe64458fa1a793ea",
    "signature": "0x9ff39372e47110b4809eecfeb9d21312d5efc58829b0f196ad0f674a4288cd8674f18c0a638ebc0e2d52d26c89df5c39150297b3df3f4fc71e7e706bcd2e10101b",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}