{
  "manageEntity": {
    "action": "Save",
    "entityId": "562828738",
    "entityType": "Track",
    "nonce": "0xc44783bf68959f86733ebdb7044c553381604225f0ae1e818f4dce15e68b791d",
    "signature": "0x5e33b67391627cc414fd2b63f4f20bd8fef7168c9901dfc414176c5db28c5fce000d131448ce7396bfa170c169191ba7fd009ff78991669b560af32e6f916f2b1c",
    "signer": "0x26Feee0AaDc0e2d8f7aBEd5cdb0bCD7D325F618d",
    "userId": "354535"
  }
}