{
  "manageEntity": {
    "action": "Save",
    "entityId": "541166",
    "entityType": "Track",
    "nonce": "0x48f7a1b888ca123a57b254379f25af8ebda30761b5b816d6373c296ca849ed14",
    "signature": "0x6c7803940f346f1eba81f32c90999f8ec49d2ad055b427b601f4355af3ae92ae1fcb11efda78cae2116421e3ef02ee1f78035f66fb473b7e8d877f1d9248c6a81b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}