{
  "manageEntity": {
    "action": "Save",
    "entityId": "864379786",
    "entityType": "Track",
    "nonce": "0xf8a5160a8a8742578667fb79fcd0fed477a31693651d844422e6aee6728fb70e",
    "signature": "0xa28574dcd0cb8b3d6194d765d7455731b23f2a36283e8d26a6b391df8d0c54c34f74184dc2e1a543954432dd6747f7f29542cd2f5e4a63c3e7c3f064a27d0e591c",
    "signer": "0x9c3B758948f27dCECee5f39438D5E15d6e82FB67",
    "userId": "283863311"
  }
}