{
  "manageEntity": {
    "action": "Save",
    "entityId": "206642",
    "entityType": "Track",
    "nonce": "0x739e76241d84c0bcad41bd0ce34f01a863bd49baececb8f506283f680e593839",
    "signature": "0x9e3069a9aef5624f858496adccdc9c31f528028a9054b254382c7b8ade59162c7226fdce7d53112fcdc44dadcc62262d0725a9fa9b50ad656dc2a892f9265c0a1b",
    "signer": "0xfa1f98f0530E55C2BEFA45f0F1B3A699b4559136",
    "userId": "149566028"
  }
}