{
  "manageEntity": {
    "action": "Save",
    "entityId": "55184534",
    "entityType": "Track",
    "nonce": "0x5b7f7c44e97c69a72e8aa041bedc4258f61f287ae3680c63af1f685c0e0aae4f",
    "signature": "0x78aa999be773b7adee0729ccda287fb6c8b95e6cc6d3c8ea55cdefe2ec98efcd2369c24474ed46c1112505c51dc248beef70586b05deacaf1f9764383a7840c91c",
    "signer": "0x4D8EDeF47b57f98c89BDFf851267B0327BE4cD05",
    "userId": "5307724"
  }
}