{
  "manageEntity": {
    "action": "Save",
    "entityId": "1352627270",
    "entityType": "Track",
    "nonce": "0xf2de1b970e99c91d2e209f7dacfd9c08ecbe5e4205bb1ab713a6172f90df0fd8",
    "signature": "0xe24c07ff03ead8c5b6acd44c6dac15b7c69ee69471d53370a58781599e9daf1a600881ee74139db81a0c2b75136ca480cac654488d2c9efebc4c17d76da5b70b1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}