{
  "manageEntity": {
    "action": "Save",
    "entityId": "1019841",
    "entityType": "Track",
    "nonce": "0x2a913b267e8e22f381913655090c9bad380a1805338d529697e1768be124357b",
    "signature": "0xe4a94beb5678f5f4857ef3ea81ed82dddf7d13d82278816082b8495c35ce876c2572a20029377b4acb3747dd56c81baa24acc0c281cbeb062071d043fd7ec5c61b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}