{
  "manageEntity": {
    "action": "Save",
    "entityId": "130573205",
    "entityType": "Track",
    "nonce": "0x71912dd6d7cb3b1aaa4350537a34cbb513701ddb4699ede9402b72f1fe9c61f9",
    "signature": "0xbfe1ec4e7eac6e606d511b1b3f34254e21bfb65d8c994493b48197014756f7605ef5449ac8622aa3952a9a4f8d6221eef4b3f8fb25b0d0c20f2323f094f7651f1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}