{
  "manageEntity": {
    "action": "Save",
    "entityId": "1187305284",
    "entityType": "Track",
    "nonce": "0xc6bf90a275a6029a83af584b2755aa02c83cd0869d2acde28dce2c4e1201a314",
    "signature": "0x418f153eb40f9c10555fa30ce83c34dcbed85cb4031852f7f1e2a55d848308d2506d98dfb18713d447621d9364a142040769c7b229fb928c07a2ae0b24fbcad11b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}