{
  "manageEntity": {
    "action": "Save",
    "entityId": "2142408625",
    "entityType": "Track",
    "nonce": "0x2e6c5cd564f620b09b31146ab098642425a2b11a5e361d7a558c4b9c9c66bf00",
    "signature": "0xdaf603340e033280ddc43b636aeaf22ed6afd3780015b0527e5c1e4f5fa448f127d334b7d8817f698dec63ff4b66d22f177c243c30d6b6743588306f5ff783471c",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}