{
  "manageEntity": {
    "action": "Save",
    "entityId": "822209247",
    "entityType": "Track",
    "nonce": "0x4e787459cc2292f820d808f3320fa82bba920f68dd9f7cecc043da1920667f63",
    "signature": "0x4c646ad0ad3251977a4c8cafc123457180e2e86b97fdd2e744cdb41dfff0db553023a894f857b7b505c535c10bb459095444a6e5e0d2877deab17982d51813b51b",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}