{
  "manageEntity": {
    "action": "Save",
    "entityId": "842098319",
    "entityType": "Track",
    "nonce": "0xf62e2245a19c74e9423497d27f3d49ea3faffa039d142b4d51866b90cb2264a3",
    "signature": "0x3641059d943e5f90985bc85628d0931f11beb1ffccfd3c2cc787eaa2c6aa6ad3290cb3e009399a0b82a44a4709a98addc6411c089ed15529bc58a72ba8332b961b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}