{
  "manageEntity": {
    "action": "Save",
    "entityId": "1909865538",
    "entityType": "Track",
    "nonce": "0x844088151f328bc2164632bc38d4cbb3cf8b4df43994197b1e258f914f4a0d07",
    "signature": "0x33fbb0c7cca86b060ffa0ecc4fb8a064b744879107b479145ebab3b38b0435f073e423ca3040288cfaf8ae6fdd9e862ec643ea1661a595bc5c1184246ce77e271c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}