{
  "manageEntity": {
    "action": "Save",
    "entityId": "1399022366",
    "entityType": "Track",
    "nonce": "0xfeca65bf1d1600f6ce826f10ab81c4a6ae16d8da21b3a136486fae1e0ec01399",
    "signature": "0x3b0b9b69df4bdf253c23f78bf99e2b4f9e5a8a3cefe1313191e6cf5ff50dc6552c2dc1d810777d5b8352f5bf99995589799dce553f9c0caca5becaef93f3ff901c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}