{
  "manageEntity": {
    "action": "Save",
    "entityId": "919646814",
    "entityType": "Track",
    "nonce": "0x8ee7912416fe530e9fea91c3c5ecf58bc97c767776dbbb6d734a5eca9e11fc52",
    "signature": "0x1c1141e3543de51ad910669b32ea46788dfeb10cff9447ce998453e83338b717215ddd7c802cbd800087d09e4766cd8e2a027bee92838bee74d789416636f6d91c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}