{
  "manageEntity": {
    "action": "Save",
    "entityId": "1540149669",
    "entityType": "Track",
    "nonce": "0xa32ef86eea8e829d98e9ee9135aa572eaa53cb65dc28238f343845124ce4eeba",
    "signature": "0x033db8033ea424d732efad49d2babb99a2ecca1b2f10c3f7f658a8d094a3058c1b4a5c45f1e20b405ce744bb7b9c74abbd73a5f2b4f3ee2873012bb4f6b9d8bf1c",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}