{
  "manageEntity": {
    "action": "Save",
    "entityId": "149620741",
    "entityType": "Track",
    "nonce": "0x5496ebf0ee4473747b96ad1c04f260e93cedf3cf7b0ce4691c4939d66c30afb6",
    "signature": "0x8c4356cbfc12c88ebeb6e4bf3afa4683081fe0cd0821b69f2ff882bbf7569d7125a5d798cc575e58f53fe026760768a70e2f34475015de946648b09607ff19011b",
    "signer": "0x06F989586c5477333A41f6057f224Df79903862a",
    "userId": "24240642"
  }
}