{
  "manageEntity": {
    "action": "Save",
    "entityId": "285969",
    "entityType": "Track",
    "nonce": "0x0b083ebe546092b72441bb08bba271a0796512ac6df7965227eb2c85016ee214",
    "signature": "0x1883ef0a974d63e0b9aa16a657ef320bcfee2c119ff9c601e995af242c79d49251c377ad218fc241d5d1b32801ba8972953ad3ac651f27f2bc8adf917ea80c3c1b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}