{
  "manageEntity": {
    "action": "Save",
    "entityId": "1198916482",
    "entityType": "Track",
    "nonce": "0x274b67d73db9d3a02ed167b204cb36ddbe6b5579d818c366d96d90a4993c3c40",
    "signature": "0xdb43f4694f0b13a45c9be58fad2cb284837ad461bbdd9a0538cffda46e59c0496b82c2db9f774331b4d48ad569a4489856641007bd64d22a910b17d32f3e88be1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}