{
  "manageEntity": {
    "action": "Save",
    "entityId": "1913030002",
    "entityType": "Track",
    "nonce": "0x246477347d2e737af5a3dbc58a563f364b247bbca8d3eea7c38e399cb392a1b6",
    "signature": "0x692ad5e044497f6b8750ca11eb8d1f990c0db819a97298e551e3a71e2108fb5e787f04678d4b902c4b399bcd73286820783d219ce8a297a32fd65f03b30a3a811b",
    "signer": "0x742Fff9be20F80Ce7285c8Ab12B9018Ef3Cf14F0",
    "userId": "111467392"
  }
}