{
  "manageEntity": {
    "action": "Save",
    "entityId": "1979056841",
    "entityType": "Track",
    "nonce": "0x1cb1f3a48486ef20a5b63e8ea168efe6969916c16ac5424e937834b6f31448a7",
    "signature": "0x7c5d63f6986e8600eeea3eb6f5df8829917c97f3847b4089512f878fa960adea74e684f85ff8c595b602d14dc3f9637b642500d4d040f63965af691bfd2b8a861b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}