{
  "manageEntity": {
    "action": "Save",
    "entityId": "161889552",
    "entityType": "Track",
    "nonce": "0x65218dab68dd969c7b264cf475d86a18cbc3973c7f47577a2e78f12a339dbe90",
    "signature": "0x3a47d127336f9a996ff350d4b9ddf12ef0b07f23841525f679443c12f8f1818311577447ff73fff94186c26d4d4ee3c7434e7ac0580d6f1765dd034c9351c8e91b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}