{
  "manageEntity": {
    "action": "Save",
    "entityId": "790094624",
    "entityType": "Track",
    "nonce": "0xd0548a3a5f6f5576cd009f23701a2661f0a41da3ff2f081b96f4155dbbfca2cb",
    "signature": "0xa0246694a9025d5f03d939fe9f9781aeeb8ecbe2fe324ca69f6cfb64118c12d0040d90d179eeb64e1d6aba5dda963fb8659d2e3ae89b176906841ec6ccaa91d01c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}