{
  "manageEntity": {
    "action": "Save",
    "entityId": "406069",
    "entityType": "Track",
    "nonce": "0x14cd0d68876dc35f6a89de80d6bf9e1f89e2cdfa6b07f8725bd27e64b85e5305",
    "signature": "0xf2cefb1d211f8fcf010056d34ba7e5ff6eb6a3b35a041cb2c33beb5ae90122a71b910e42bb8aabc8c2a7c8655b563f31c6dfb308d1ceacb39642896f0682380a1c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}