{
  "manageEntity": {
    "action": "Save",
    "entityId": "114663",
    "entityType": "Track",
    "nonce": "0x21ec4a26cf674a17ee8441a789c1ad9a057d1f186d1cb6bdeaccb81cbae63895",
    "signature": "0xef047c691f8b261133dd6896ff72eec01d76c8875835d84488da822da0c9b0ce35b25d51f336cfb0c8ef4012aeb491fcad8fd4d8e5504a8700aaa1e61d2ee0da1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}