{
  "manageEntity": {
    "action": "Save",
    "entityId": "954481",
    "entityType": "Track",
    "nonce": "0x70017cf581a11d7e8cb64e0e4b647c15394bb43052c2d0b10fb00fc43da673d3",
    "signature": "0xc417eeb06f00be802de7d4413bd62361d811fa9d1e706673b7887574bb35c8ed4b3cef4d4be4063230ded10777301ad337cb1ccf2187618a36eb58fb37cf16eb1c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}