{
  "manageEntity": {
    "action": "Save",
    "entityId": "939441913",
    "entityType": "Track",
    "nonce": "0x1af7b6f2b5a9fd63f81465e9cbbf9ccff239b13fa66707783002e347a05c2a7b",
    "signature": "0xe58a79c5147bc94237325f290c0f1493ad7d90824379d748e74c73484cf9be652d80324572bc52bcce1c2feace82b511567f37836fc9936318f0c4588d0b1efa1c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}