{
  "manageEntity": {
    "action": "Save",
    "entityId": "1505867363",
    "entityType": "Track",
    "nonce": "0xdfdd345524c47ceb22c5475caf6c79bb477b26a33db94d0838d1e53cc2142240",
    "signature": "0x0f95741488611c1dd0568fd65614efa6d37a4da539f84204bdce0e557a2f14855de1b6e0d226e6877bcf94f13478769e616d539fd78fbeab5586ce13c2c9ca951c",
    "signer": "0x97eAfE883FbF33a8b75f6f37440caFE5CC452d3f",
    "userId": "849776474"
  }
}