{
  "manageEntity": {
    "action": "Save",
    "entityId": "376948992",
    "entityType": "Track",
    "nonce": "0x8659232df38b7bee21ab0b2383d91176c41bf8d87c839fce45e9ee776aa5a8a8",
    "signature": "0x227260e5e88819149cd79622f821be68e080d3bad9e084297121e999d3beb8b72bfc22a68a642eeb967cce5efdb943dd025ffe56f2ebc200a87f9b690607330a1c",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}