{
  "manageEntity": {
    "action": "Save",
    "entityId": "1885363443",
    "entityType": "Track",
    "nonce": "0xa4e1c2126b60ddbe94dae311f14f972a8b420bda4277f674edd11bd667570ad0",
    "signature": "0x0fe4a83a735a82d375e3a3771ef0a92606f834a5a4535acdc6fe5b19d57a52e5474df86596bb90142f4a5beaccfe10ee8ea6fcee39f0d7041d778117786bc6351b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}