{
  "manageEntity": {
    "action": "Save",
    "entityId": "1309757844",
    "entityType": "Track",
    "nonce": "0x620585d68207195b200ccf202f713ff38c3a380593995665e6ff2fa9b3766d0d",
    "signature": "0x6a7be8b769f940fea621299a8162203514446346e0fe39eb0ba5508fd0dc6b997f83d4377405e3b6653293dea3420a0d44c4fcfac119d3fe5c9f5880534bd44e1c",
    "signer": "0x3df67dfC4e44eb904F21415Ff9d1c71d584c33ad",
    "userId": "180188"
  }
}