{
  "manageEntity": {
    "action": "Save",
    "entityId": "651601357",
    "entityType": "Track",
    "nonce": "0xf1922803e7e4e86b41a22fccf3539d024f08dfbc626297ac2be22074a10749aa",
    "signature": "0xef43d8ca94e961728f2fc9eb155fb92f437bd3f58995beb8567ce143e5f577fe278bbbd27a35e29d1ac3b699ff3c87efe887bb75081edb5d94eb21a03dfe101c1c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}