{
  "manageEntity": {
    "action": "Save",
    "entityId": "761746432",
    "entityType": "Track",
    "nonce": "0x864df82ab7ded84870b70275e5e0786c93e243e233eee0c3146041fd0155bcf0",
    "signature": "0x96ee6e1f07caa2f35b685da3539aa21e41bfb8eb1bd74d236b876329260e9cc70f9ddff8fe009ba603402a367d27923087efaa0ecea0a0f5c0f7cbd4af7ca66a1c",
    "signer": "0x4E3828bc809fb5B9deb81fa536cF73Dd5bF4eeB2",
    "userId": "185184169"
  }
}