{
  "manageEntity": {
    "action": "Save",
    "entityId": "1526841539",
    "entityType": "Track",
    "nonce": "0xd2d836f9b92b80889f3ddfef1f279bef550a1fa2817a8e62ca9c7a894e808830",
    "signature": "0x95ccf28a07627ce2facdddde597bbfc9a55d1754e3eed44baac796bf44c1bd885b7cad6b9ec1ec4ffcd0dcba96655047b7ea6f1cfd076079bd9be23933b6edc21c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}