{
  "manageEntity": {
    "action": "Save",
    "entityId": "544893237",
    "entityType": "Track",
    "nonce": "0xc4cd8fc6f97f1ef503f169d0118eda4571389a51e46dc3e41837275f9bb5cd8f",
    "signature": "0xe9a2919c642991968c5213bc460554b808d56ccacfac910217be2f8990325fd460e975309707380c30efecf0674e2f383cab5e2e88c364d9b8dcd992556d697e1b",
    "signer": "0x4A3D09CdfD42dE4C57dc67B09a40B5d9172bD69f",
    "userId": "787102835"
  }
}