{
  "manageEntity": {
    "action": "Save",
    "entityId": "33148262",
    "entityType": "Track",
    "nonce": "0x24fa5672ee687f85e361e3af5c57d9e2add8db4ed5e90470e1d6b39c49e031ff",
    "signature": "0x8ae325bf830e00843812da340c9c4cb2cbc6bc77985551cda82f728a5e1f72017d704f20fbad35eb3db8283c7830262c46e2c08d3bb8e47ebed95fb2275efb651c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}