{
  "manageEntity": {
    "action": "Save",
    "entityId": "31661512",
    "entityType": "Track",
    "nonce": "0x3c6c421f790fba3d36d0ee23854f38457052f1e176d592ea274dc877553313d6",
    "signature": "0x8590a66e330035da3bb0bb41f515f8ce471988dff096fad329327fa5598f6a9c3de751dc887623caa1f69c16be8d314513805fb0223a78a1dd25206bb4273e471b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}