{
  "manageEntity": {
    "action": "Save",
    "entityId": "1325528488",
    "entityType": "Track",
    "nonce": "0x3190d935db6707094a99cb477c89d2f2c5775f46a52675df384c3ab848d9acf9",
    "signature": "0xedcefa36826f40328d2e3924e2dcdf9f198c6f24786af9468dfb0a470cb1d1da0fb406da49c48a154a959f11c3ae47f61184e23fc832226eb4c292deb61e93f81c",
    "signer": "0xDD3Cb841c7f19ec5581F8E2b14d6f7a58B92d0F7",
    "userId": "582464754"
  }
}