{
  "manageEntity": {
    "action": "Save",
    "entityId": "1315742388",
    "entityType": "Track",
    "nonce": "0x3877c9f6f0bcd7dc4cf659803eca14087f91aa736aace5bf211b809c3ccbd960",
    "signature": "0xdac3650c055966be15526a6c4f187140b350b15ba7679d828f01b0de405f91b96ddcd0a7092de5eba2ac7bc3194c6bb39086ffc220197111ee4e4a230a7548911b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}