{
  "manageEntity": {
    "action": "Save",
    "entityId": "981566426",
    "entityType": "Track",
    "nonce": "0xa2c777b2d5868b698eb573ec9d98fdff0db94b2ac21e61e0d7d0ee9c7f0f7d52",
    "signature": "0x89609417b4c366c039f9f624e506a1a20d9067c30c28ffa56ef19176b8c547b238e7e18e216ef3f6a6593d9ee3de2a22b976ad360692b750b8f41e8e9f9158a91c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}