{
  "manageEntity": {
    "action": "Save",
    "entityId": "471088651",
    "entityType": "Track",
    "nonce": "0xdb1a44cff8fed75d8707a3c74cd87e4292381e6554f8d4eb1428aab6e827fa3f",
    "signature": "0x1c85aa558d10fdd2ae278c26dfdc66b1acf670bbda488043dbba9f6d5326cff91f15233a97e883db21f7ecbd6c6ab1521a002b4e1f9c61059c140db0487b3cf51b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}