{
  "manageEntity": {
    "action": "Save",
    "entityId": "1873361805",
    "entityType": "Track",
    "nonce": "0x7c7b9047c2dd5b77c829c8129a994cb37f145d34c5013a37ee98d1c892170f5a",
    "signature": "0xfc1f246e0be9fbe064fd904292096f9b53e475320b5d61188eb61cdf70aa3ffa5f20f4f5d15b7ec4d532682a16d9dedc343eef1743c65d09ee8183d5ee5abb6f1b",
    "signer": "0xdA0eFB0e7b973C487c12501759aDb23012CB5248",
    "userId": "178070"
  }
}