{
  "manageEntity": {
    "action": "Save",
    "entityId": "266410",
    "entityType": "Track",
    "nonce": "0x80c442bda490a88505a71eaf0b6508549f3a3dd0341a542fd65d21c115d86aed",
    "signature": "0x4504c4a3c381e68253d13dedebba9a92e7ac2e01d3a1f55eb36bd7d26e2431fc6ebc376d5159e3ee40477efca972560fe800ebcd09cdb1c9461d54d26040ee641c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}