{
  "manageEntity": {
    "action": "Save",
    "entityId": "2090259665",
    "entityType": "Track",
    "nonce": "0x30e83ce979c81bfdd2500a1d29053d2755282b881a69d91e4e1ebb061a9b5f13",
    "signature": "0x29605db6b997737cff06e0fb77acdec0e61098a6669dd3fe75406652e8604378438118b9c5676b049d85ebd8d31cfa802f39d9e6808032e81cbaf755ea3328d31c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}