{
  "manageEntity": {
    "action": "Save",
    "entityId": "1890880896",
    "entityType": "Track",
    "nonce": "0x410ae1795ab4c8e59af29ffead3b47591719b8d79de65fac41888c5c5f2c061d",
    "signature": "0x46001f741f94731ffc6e14a650363cf7467409c486cf4fbef68f45aab80f916b537c1b2d144b666dd0deb2c5159b33403d56632b120534fbf054201be6be6b341b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}