{
  "manageEntity": {
    "action": "Save",
    "entityId": "1047730490",
    "entityType": "Track",
    "nonce": "0x47108f6a810fad72c463fa731398ac2a5a22e1f2bd239fd9f72bcb6bf7605209",
    "signature": "0x8c6e2f4dc4f1d5d360718ef758285c83dd2cc85aff0c036f3077344c17afa83d3998231e5f0f7c758e84ce02dc3b1f0e6d88d8cce72c45118a7da6e536c7029f1b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}