{
  "manageEntity": {
    "action": "Save",
    "entityId": "2005288419",
    "entityType": "Track",
    "nonce": "0x166a33004a9427186a8010a31d9f7b93cf6efc845592f7a815e2e72848a4a5b2",
    "signature": "0xea3762cfad49b85e618d6ef4b898c4a1f4739da7c1fa989adb5dfb335fa8f11b4044fe82be163e9d5c4f268e8891a91bb8ed6622a324cb1e2337ef550a9b88a01c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}