{
  "manageEntity": {
    "action": "Save",
    "entityId": "1691308282",
    "entityType": "Track",
    "nonce": "0x899cff666776f7ba4bfc858583003110813acf87f19416988eeb8e3513ee3666",
    "signature": "0xb700d78a78ae040a6b2151db1a015f4d1493eef9cd7986774284e72f988ebc1418f491e048f04effa735443e5a2d0f9826efdcc72b583fd66ba82b33c145ab8a1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}