{
  "manageEntity": {
    "action": "Save",
    "entityId": "1077742",
    "entityType": "Track",
    "nonce": "0x97a3b1383cd7e1352cae57abf221171b2876e42905f2738a0e2baa48d1871497",
    "signature": "0x96df5443f50149149e0f5c53c866be1ce806ded52a57753a119267afe6862b0c461cf8e9b556ed10956c64fbb2d2fd2a055d13171d9f600f522c5753d364d3f81b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}