{
  "manageEntity": {
    "action": "Save",
    "entityId": "435805523",
    "entityType": "Track",
    "nonce": "0x210ffe2ddf135472380dd2a0e7e1a6cd6606bcdbb7a99aac63038a4d854b24c5",
    "signature": "0xeee9f9170883404dec055a6767f2b1df13cba279e11cb68ce5868b12c7e7624e6f3371588e055f2279c5f10584cc854c297b78421eb293c624ebbd56bd45eddb1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}