{
  "manageEntity": {
    "action": "Save",
    "entityId": "624957502",
    "entityType": "Track",
    "nonce": "0x97f81ee50e00017076bb0720f82a87196063a1c47ad95b6ee527555b92e0e2e4",
    "signature": "0x587bde3c2d93c102c1a14efc2b95aab3da7159443d062a93f09373cd8a23461651877befb7ad36081ff6c437fbd0a3542acd0b14582958049958d3d5ef75de561c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}