{
  "manageEntity": {
    "action": "Save",
    "entityId": "1171021155",
    "entityType": "Track",
    "nonce": "0xb457a10350e9ceb0de891a0e8d1556c89453027a6bb477d8b1aa2ac4a73d7405",
    "signature": "0x1119cd137a8888a52009ec4f120eaf1ab7b88f4f9f851907dce38583b546fd1532071547a4ca4d4ab204e7b4f2d034ef4c50e3ed9824106eb1f77f6da7bcbe571b",
    "signer": "0x08a25800F127553f38f347893c63c7fF8bd580d2",
    "userId": "767590456"
  }
}