{
  "manageEntity": {
    "action": "Save",
    "entityId": "1890055761",
    "entityType": "Track",
    "nonce": "0xdc4c2b76dbc5019bf3044a92125d8f8ca0956dfa8a5a63dc9629b59e02ccb461",
    "signature": "0xc79b30805dbe3d7d0cf5f33fa5249b0cda83edbed6b6b01d7b0008ccdefe33d330c71cad03333a1aa63860bbcef534f15d1152aefba76268bdad0d82554168201c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}