{
  "manageEntity": {
    "action": "Save",
    "entityId": "836665910",
    "entityType": "Track",
    "nonce": "0xdaee1f2909195c94a2079cbeab07182475a61cfd9170584bce1de3d092f47c14",
    "signature": "0xbd8681e9e201639b3ce5f6056a9707a6d0075f157de3b1bc4274ab5ac857ed3257ed94feb333b61b624a6b83a27a339303142a37233e2873669a5e8248422af71b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}