{
  "manageEntity": {
    "action": "Save",
    "entityId": "1781223139",
    "entityType": "Track",
    "nonce": "0x69e5327b245c28bd8de07e7a3ef0b2bcb9d29f9acdb7d01d6054326f135987d6",
    "signature": "0x436c67665907aa3c03d115fa072212b51c1b62e3ddb296f1719d6bd22c4b432c7c05d984969dd64da089b297d0a721c249bd6fe82ef8cf618fce7f6c794df6381c",
    "signer": "0x44c6c9974E4028ab550E0311F9A04Df023477958",
    "userId": "152450"
  }
}