{
  "manageEntity": {
    "action": "Save",
    "entityId": "698069210",
    "entityType": "Track",
    "nonce": "0x79cd32a68b5f61f5dc43e8592800f332b0381f66a24ed5f9b6787c0affa3a42e",
    "signature": "0xe3574aa8d8eae52d1d8095646a5fdab49b9bfb9b596b2a70496bd2ee1a7fdc3b5c7e22b79e73d8fffce1460765ccd117ff27f0573005b74e4cfb60b2a3a210ac1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}