{
  "manageEntity": {
    "action": "Save",
    "entityId": "166765469",
    "entityType": "Track",
    "nonce": "0x03f8a1e770b5e73fbc7b05863ad31afe53b25123cf76f88eb7dab3c95d9e156d",
    "signature": "0x51f40f38e92f6ae8aae460f3835588560265843616711c7eb48b1a9158f644d542d86654d87dc01f2d734f0a975f62abe517434f611981d9a7850dbe9a7eb4901b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}