{
  "manageEntity": {
    "action": "Save",
    "entityId": "1050445395",
    "entityType": "Track",
    "nonce": "0x98fc5b4ac32fac32ce586daca06b43174870718d4c98af4ab479a61cf907f1fd",
    "signature": "0xfe5507080b1979815b0835a6420ce9ea4e6aadce959ef95500128ca17dff75e03e76c52ad1de18a036c9eb65ac54f21d793b3c95d5e7ded59202673fdf6cb22c1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}