{
  "manageEntity": {
    "action": "Save",
    "entityId": "1559828717",
    "entityType": "Track",
    "nonce": "0x20fbb14a516371b5b1b3108758b05c440ab8e1f8371043233501581086f22b90",
    "signature": "0x95c7f4d9c2b131b4897195bee397a975ed6944e7278d372acc1fbbc8bcf28bb12618b9fa4756e88f090fb17b3e68be94b65b9c3328fccae09a237cf97dd85fda1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}