{
  "manageEntity": {
    "action": "Save",
    "entityId": "1451725131",
    "entityType": "Track",
    "nonce": "0xa7126960dc163ce49816a208add51aa60f53b914bb3e1aa8b2da2e03ae572812",
    "signature": "0xea956414c6054c98182bed1bb9535ce3e4db09f360d6dabfe02691b5f05b3b2657e1c9570e99a09ccdc6ffbf0e49d6287bd0d22919ef04157359c9469c4261071c",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}