{
  "manageEntity": {
    "action": "Save",
    "entityId": "895874533",
    "entityType": "Track",
    "nonce": "0x78e1103c7e205671305bcb7b5928fff1fa753e451fcccb3e249b0c23b4cd42f7",
    "signature": "0x39890aa5af82d8c4d6141984179125bf91ec45f136c7d10a23256f3cffd856822011ff8fb347d41ec2b5bd49f2ed3f1f74da516d4d78f00eb5655f01d3222e351b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}