{
  "manageEntity": {
    "action": "Save",
    "entityId": "1056407990",
    "entityType": "Track",
    "nonce": "0x64ecb58e117eeb9cd457e0923387d93593269164eb714a9df897ec7677548bcf",
    "signature": "0x4cd465fce47f3ae7f462e2015167cf918923dd50e3d7f5a94cf4cef2f61c8fa55bf7f060794237055e82399b61343763b8be21a083241270c9f51f616bf9a6f91c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}