{
  "manageEntity": {
    "action": "Save",
    "entityId": "1471443835",
    "entityType": "Track",
    "nonce": "0xb295d74e29223f375caa663c3a29bb0e211612157b38b2afadcd546151e8cfd0",
    "signature": "0x72bda3f1bc03364077241bc8801d9e2b3a5cd0f5836a07c516fd8f18314916e146e4e9c2b005d9a3f75465cdda0f26358b3705419529df0ebdafba99cb1ce9271c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}