{
  "manageEntity": {
    "action": "Save",
    "entityId": "1998844219",
    "entityType": "Track",
    "nonce": "0x1d1df37e04eed3d07c1fb5157e65a5f064dfb68a6ba7573f680e12db404b9c5f",
    "signature": "0x1c1700c4d06995fdafdf91fe4ba7cad89d08a65d6425fe9a0c44925ea68989637abd4768d298f75aa41d59f8d29728a4e8130d74d7456b3308dab6d6b6723ba31b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}