{
  "manageEntity": {
    "action": "Save",
    "entityId": "1361651849",
    "entityType": "Track",
    "nonce": "0x28339cf60a1cb87f22d727a4b4ff586c80f4813f6f09c2b517957f9f453acf8f",
    "signature": "0xe389d894d2b3ed7160bb3e0213c1ce268ac3178457fd4841f876b697c6aea8ed65e23db998d535f748fd019cc9b4a3f3b962ab7e6184458b1b1c2a05f54eb97c1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}