{
  "manageEntity": {
    "action": "Save",
    "entityId": "345616833",
    "entityType": "Track",
    "nonce": "0x7dfeca62468aaf6cb0e31df8d2c29828e406e4a4911d21b4383fb95266888b20",
    "signature": "0x067c0581b4743bc472be59683b55deba319751de61a18a94162e3aa15f2bc2965e7afae3c632e74a64d3223814b68d1f58debfee40f5ac50a71076e1d405ab311b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}