{
  "manageEntity": {
    "action": "Save",
    "entityId": "525400144",
    "entityType": "Track",
    "nonce": "0xc186f198e8aea7d0f8d61e2e4f691450a5b0852115dd41f574263c1c6e346908",
    "signature": "0xcd9c8f8db69c330c965a778a834717229db1e69f294e242066a4f1a98b71f9d62c7d6e097bb51d802fe6667cbd9f7e9f5c1217ea31a5634ca29963be38589c3f1b",
    "signer": "0x97eAfE883FbF33a8b75f6f37440caFE5CC452d3f",
    "userId": "849776474"
  }
}