{
  "manageEntity": {
    "action": "Save",
    "entityId": "499576072",
    "entityType": "Track",
    "nonce": "0x3c7c85461a1e54733a301e540d86f874516287863168e4d0df171748d0b4deeb",
    "signature": "0x1ec77b17e57ccbf003a910901eccfbf9814fd4c495bb5f2b397c3e95de575626635f2c9d099765d5c53dbbf604cf3442df714f0ff70a308f1cb9b1d2b6d291761b",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}