{
  "manageEntity": {
    "action": "Save",
    "entityId": "1016562",
    "entityType": "Track",
    "nonce": "0x3152ac888f1d2c23df3dcc901070f6e1d469cf72cee7fdcd2bd4491c6d8d4f72",
    "signature": "0xa8ca5620c25abe0003da7e7f3592f08d2fc8859af1d5ada1366a02dc4b9de0d1050c37c89f5bf6e9c24f8d6dd24aed96095242dbc58d8ef41604f0b4dcd051e01c",
    "signer": "0x5E1b23614a9da638dba09e8aB2E9B76ed81c688f",
    "userId": "306948669"
  }
}