{
  "manageEntity": {
    "action": "Save",
    "entityId": "1089648305",
    "entityType": "Track",
    "nonce": "0x504c2269f93bad8837100bf988d4c6806c4c910f23f8cb4ca6312af639a0f0da",
    "signature": "0x43f682c17b15ef5b1bb832031c9765eb41b65a4bed39712abce2d99c9c80d39d327f02c4b5d944d9e0fb20cbd7955723455beebb26044e796adc8fe90660acab1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}