{
  "manageEntity": {
    "action": "Save",
    "entityId": "1941444632",
    "entityType": "Track",
    "nonce": "0xafadf36cf01643c2d8aab43295745473b9e5ef0686280bfd03b0c9fb215e689f",
    "signature": "0xda33b13244f61a9b3e4eeebe6303c84593832bf0b8954e9801f71cdb1a5800c021c943ed8df7be647e4d84d28157d066fe4efb14a7eb18309f5bdad924f707991c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}