{
  "manageEntity": {
    "action": "Save",
    "entityId": "250938",
    "entityType": "Track",
    "nonce": "0xb6faa3ee6d48231fab3ec9480efc751f80e9a404bc69be9126ebfa8e06b793ee",
    "signature": "0x6e6e605fa5bd854876f8447f0301f95394f6eaae8c8a960d761f29b7ed10b9184bf2251c48b173e29c7520bd906f2bad285052e8b09b7c7c079a0338188f6ba51b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}