{
  "manageEntity": {
    "action": "Save",
    "entityId": "2048624038",
    "entityType": "Track",
    "nonce": "0x08dcc4a8b6b6b363275bfd38c106040cc598a6b717bcf1f0ef0b96cff8c4202f",
    "signature": "0xff62c2bade483726bb63dfe1b928e87254d5cb4c5ccd0d02a48bb38b70767e1c6e793fd986901ae78ac2d3f39328b0e9d186ee77d24ed7bbaf8b74dd8eeab1e01b",
    "signer": "0x48FD75f1b7D81A96b8b8624aB7040523C402c202",
    "userId": "325172820"
  }
}