{
  "manageEntity": {
    "action": "Save",
    "entityId": "1564862377",
    "entityType": "Track",
    "nonce": "0x8d8b71a283ce044e8803e3292fa1dcc08f2561851b7c5f9061e40168a00e29d5",
    "signature": "0x05eb24da3b23f27808bdeef2274912e8dc1830767a9f435f90e1ea5cb2ec0868739398b8ef7bd40bde658ee01e23cc3edec446abda94ba15c4e1727cc9660ed61b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}