{
  "manageEntity": {
    "action": "Save",
    "entityId": "736298895",
    "entityType": "Track",
    "nonce": "0xa383b6786d9349754598c5b9ea550625e6b65186a1ebd298434144edf11e34e4",
    "signature": "0xbf97476b151def8a22fb5d29c8e30b273b630188ad11dbc9678a829196d158787822ef8f8151e897f5f1352ff74bdca11c6ca679013e9ed54ece94bb59f5713a1b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}