{
  "manageEntity": {
    "action": "Save",
    "entityId": "246333800",
    "entityType": "Track",
    "nonce": "0x28095035d66d4afdc749a0a46d22fbf152534bec19cb0b35881db10e6688d727",
    "signature": "0xcba0513fd57bf5716651cfc3be60d3601aced4b821eba12ded4677c0cd3786af7bcda22f250fe17fc77d1ea66f35be69015bb48d092138559b0682826fc31aa01b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}