{
  "manageEntity": {
    "action": "Save",
    "entityId": "192807",
    "entityType": "Track",
    "nonce": "0xf4270cc06252a765239cf6b358b79939b32748a78ec7f7479aa4d48560890075",
    "signature": "0x5c78df9c15ec6d51bc87cb10111855f9ea663f06bd296f160643ab0c3af8988e272bc479ddeca8f68033b0de754d32cc83ffb72123cc1a1593e74fbd4e204dcc1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}