{
  "manageEntity": {
    "action": "Save",
    "entityId": "954474",
    "entityType": "Track",
    "nonce": "0x04bce3733ba93d6b5ab5b5535163f247a22745a20a480da78f423350b28abf5b",
    "signature": "0xc7891e19bfa32bcdf96dc88243471bd751f9fa55008731896a67895016cc2f63062ad16a7e5e8617990e7667567836037542d02b19d4fdfaf5dca0f9c386766b1c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}