{
  "manageEntity": {
    "action": "Save",
    "entityId": "1077543730",
    "entityType": "Track",
    "nonce": "0x08f8ab894e728849c9032e3352264205064a3ccea915bbc941bf24e5ebcd504e",
    "signature": "0x6a3aa5a2db25ab3d21c9b02c563021616256efba26d7ca1dc3a031090e25eeb25e98fbfce625aac56d377c4428f4ec6356d400839619d040d5cd2c5e726294da1b",
    "signer": "0x7C2169544c0568cB3b210f320356B6A77E891F30",
    "userId": "495616082"
  }
}