{
  "manageEntity": {
    "action": "Save",
    "entityId": "2066162023",
    "entityType": "Track",
    "nonce": "0xbdd0fea7db52f1192b3c53efe816f48d9f2467e3f6a715e951df02584eca5d4a",
    "signature": "0xab85bd3bcef6388edbd9262f2b2cf4c86e6d632e62906fad731eeee26d2f92f83ae353fdc9fc6127de3ef9cbd741e774b1621fc124e89020ca5daf4af0de70381c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}