{
  "manageEntity": {
    "action": "Save",
    "entityId": "207772",
    "entityType": "Track",
    "nonce": "0x7755055dd400bd9e926bb6a7b3cb78004b2970e4350a6e97d8939acd33262716",
    "signature": "0x8f096b9955cc4121c391855827f685d2573b4679af0643d1df6bc86080ff87a13dfb7f9ade7cf85a18d8595229520a8de3ba9af8cefa1d37dd545c764e42895e1b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}