{
  "manageEntity": {
    "action": "Save",
    "entityId": "121484",
    "entityType": "Track",
    "nonce": "0x4f43390c2d1a026d96f6039a03691966bd35a47dd27cd6768ab7df35c84e21d2",
    "signature": "0x4d82a2cefd67b9af06805858b5bf39ba18930fabb9c8fbc684185fc2d1ef8e2876e073c1d8e26b55264e85d17974792ccb93962811c55e68bd72bacdf66b81801c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}