{
  "manageEntity": {
    "action": "Save",
    "entityId": "1488271488",
    "entityType": "Track",
    "nonce": "0x83079c7a352b3e9c145adee262ead11d42017a3245e982510c7eb49dbad1511f",
    "signature": "0x319d2ca6d5f208920519b3e0a547d811c9c88d1902dc0550698c6f4e626c77af7dc55dae3afaae609cdd792a145528997fc3a5e49901673298ffa84714ac0cd41c",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}