{
  "manageEntity": {
    "action": "Save",
    "entityId": "1984715771",
    "entityType": "Track",
    "nonce": "0x13ef4d94f2db3858685a732d7c724db0fd205f076e8bffad73d11646df4081e9",
    "signature": "0xc8398781784e22234e0278e8c53447e4a2b073a78676440911a18474fb81738864cd5f687278f8a707dac411aed0d87933adac752e09e0658b1ab40dd7e097021b",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}