{
  "manageEntity": {
    "action": "Save",
    "entityId": "530359570",
    "entityType": "Track",
    "nonce": "0xf4d8fd1501982739fc72e37077922ff80d1e73d87b1fa464363e62f88172c03b",
    "signature": "0x66e4843d60cddfeb2aeba3abcfb61c16121b994f8313ad6261f629633b6671612b6dcf07e8d865234e887642540b0c1191671162b0fccb2dce55e04c939d22171b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}