{
  "manageEntity": {
    "action": "Save",
    "entityId": "52732833",
    "entityType": "Track",
    "nonce": "0x4994664da4abe18a687c85883daec282ebcbae9c22ad22c9e2d12279896f3a20",
    "signature": "0x6ae84a2c85a48891e463545012694a7869b2eb121bd620089419b6e57d735b036706f9aacd3482cbfcbc993ba6a8add50ee1f5b29334aa8fe33489ff78f6af301b",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}