{
  "manageEntity": {
    "action": "Save",
    "entityId": "105070",
    "entityType": "Track",
    "nonce": "0xffef67e10343fb6cd2c75059a0af4e6e9f8354307978f86763951c759b753a3c",
    "signature": "0x9329eaa4ecf0053c69064965a1e3bb3c3f87701c3062341879f8ac9482688ca86e529eb7ec6d6ad2a622613121b64d5e603b51ac0997362330e559b58eb634951c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}