{
  "manageEntity": {
    "action": "Save",
    "entityId": "5774175",
    "entityType": "Track",
    "nonce": "0xe7149e63672ade5fe156de67797c01548f994d824ee10cf62db1644b10ecf6cd",
    "signature": "0xefc3d0ee2236e7384cbae7f7d042dc8feb25607c4bcef4f25e78d5d7728c0b58788901321574cc9b6fd73b0e14dd6f2baf98f7407d5c26a65bb8607360b069281b",
    "signer": "0xEbf223E3bfE29c251Ee19f0d3515DDDA00B0Ad60",
    "userId": "2018345"
  }
}