{
  "manageEntity": {
    "action": "Save",
    "entityId": "1126855",
    "entityType": "Track",
    "nonce": "0x3d3afddb5fbe2c81557574b04bc8e7bd4773bd6973a4ec928d93631918296666",
    "signature": "0xbba773f1bf05210d3e9ac97dbf1edd3a844be47df94f337ad376b1af036cc1bc627fe8651ffe98e453d23294fdbd256edcca7db9e9a860848ab1f227cd2edd111c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}