{
  "manageEntity": {
    "action": "Save",
    "entityId": "1444831172",
    "entityType": "Track",
    "nonce": "0x8f675dddb4c0633796cf8c5f249128df41c4c2b717aba0afe8939586c75a3546",
    "signature": "0x2cce5eb555bf5242911ffb202146d5f970f5d54c26bfd565cae5f8e80b0b884e1db5822fa536cf4f6837d0445cb909a2abec5001a75e91bef9401df31f4926d51b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}