{
  "manageEntity": {
    "action": "Save",
    "entityId": "2005463735",
    "entityType": "Track",
    "nonce": "0x651cd02969339bc6d65c12d121fc0e2422931edc4e4d08c473d642eb01c0239a",
    "signature": "0x1857501206948172a042ac024a0c0da9632ff6af18f3f5fbef983fc52f49f94a595c79e3a595b37d850a30e04411d9c2ad9f14857ab44c6d174a5310fdd2195e1c",
    "signer": "0x97eAfE883FbF33a8b75f6f37440caFE5CC452d3f",
    "userId": "849776474"
  }
}