{
  "manageEntity": {
    "action": "Save",
    "entityId": "1470865842",
    "entityType": "Track",
    "nonce": "0xd0c75fe8fd306dfdb353024a32e87d283be7f05b70718d05df20c37a041d278a",
    "signature": "0xa7a6d759a139807bef9a0448dd8f341202f4372242371b7567587c39026fd1cf0cfbd86f7ba92b5c1ce59a87a77d10ed21ad6a2138a368184fe079088182ecd81b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}