{
  "manageEntity": {
    "action": "Save",
    "entityId": "1801058609",
    "entityType": "Track",
    "nonce": "0x749b17225a58c68e2b94178eca1e07df26eb3cd597a169a5cf54842b5bed76a5",
    "signature": "0xf2fe5b9b034616f568e88bd99894f9f4f3e62e2480015aec9dd61920de9ff53b716d4a404ae81e7b2a738e2efb4960cb335835269b3a50c44212e845c18ab6ba1c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}