{
  "manageEntity": {
    "action": "Save",
    "entityId": "306617",
    "entityType": "Track",
    "nonce": "0xb86a4aa655eef506448cf46f6fa384538f90110c30db6de41822ae4ac3d0d8f1",
    "signature": "0x4c2788932cd35fdd4964ce48cb8ddf8f803ab551f158fe94b8b2a7a3b875972c752ccb62e6c0bdcb96ef7b1cfb8c5030df1dc7ebbcabba9913ff32d6c9a062451b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}