{
  "manageEntity": {
    "action": "Save",
    "entityId": "684048703",
    "entityType": "Track",
    "nonce": "0x830a0f2e1dc864550fcf59a978f44132b064a3aa18858143ac46928a62830797",
    "signature": "0xd661296bbda424cafa9bef8cef2b1438d16c64528a4297482adc07e867d6d6c74e484756c7bc7778be620f25a5eef628a0904bf1533ed204475eea319b03bff51b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}