{
  "manageEntity": {
    "action": "Save",
    "entityId": "171364724",
    "entityType": "Track",
    "nonce": "0xf9459dbc007635ef771daa7fd17c3fdf515d3539beb1c7d2c4359b6e786892f8",
    "signature": "0xfdf1230e61ee9462ad5cc7ad371840b1e84805bcce7079d98baf3d844d686fbb52b1883af3ba0fe80f68f7ed1f6857036291e17eb991011c5e723bd765dcd5701c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}