{
  "manageEntity": {
    "action": "Save",
    "entityId": "66775038",
    "entityType": "Track",
    "nonce": "0x3ca4104912dd99c4c7d6df8aba5560f101a2469f5a332183c0f491a93d08ee3d",
    "signature": "0x626f8d7a08fc2b14c9d20b5e5c31c66394873ee79c2fb47f973557d2257bec25455268dbd5122418f19ed7f91029b6e88c2048c1d6f03d7d19a4916c6598403f1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}