{
  "manageEntity": {
    "action": "Save",
    "entityId": "808208771",
    "entityType": "Track",
    "nonce": "0xb12eef75ab8c34e8e652572b8e0fe75552693e9d5e0acf1a5b32ab3e3f1bc4be",
    "signature": "0x6c5583f2632db31cf14686a4ed63344d5a28cc96f01740aca2fa5e0d94e1b70256c3fde8b46580e9d7a23475436562a7c3378ea6172f3b09d016c6e259c1ece51c",
    "signer": "0xa8E11aa224d2579f5cbdb912866bCE84Eb10f9dD",
    "userId": "951616224"
  }
}