{
  "manageEntity": {
    "action": "Save",
    "entityId": "1595713631",
    "entityType": "Track",
    "nonce": "0x14e7ebe0cd2ab3b339c4d93dcf8d0103fac90fed9d6fbdf6e9089c6cebc78d49",
    "signature": "0x1055b7899c3435f575f363386f842351e1810d2e37ee105911d25c19db38d3d11c8e31c7f3afb14d37e637b043ec72438a2331d8b10b0ecb60fbcb471dd822ff1c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}