{
  "manageEntity": {
    "action": "Save",
    "entityId": "2141219813",
    "entityType": "Track",
    "nonce": "0x5df0a63331ecd852bb560f050b5158fde4e042ab614366a0550baa448d93f710",
    "signature": "0xbd5c4f466740ab429105ab4054dab919cc92a2617039bab7083a18aa6219537f5953d1f568ad73624f520b4b69a56350dfc02063d0706701cd349dc51e320afa1b",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}