{
  "manageEntity": {
    "action": "Save",
    "entityId": "480243",
    "entityType": "Track",
    "nonce": "0xf99dc2818c77987f41ed3e94d84ab6efcfa286d32cf5fed9086d1f2f0c3d99e3",
    "signature": "0x418ae9a5960d0b1bd67520301b9f1e3d966a1fe697f3c27605f1b6d12cc93b84330159069c8a95dcc7908f2c73116a09c96e5a137ad432bab09a891ee811f8961b",
    "signer": "0x742Fff9be20F80Ce7285c8Ab12B9018Ef3Cf14F0",
    "userId": "111467392"
  }
}