{
  "manageEntity": {
    "action": "Save",
    "entityId": "2064646764",
    "entityType": "Track",
    "nonce": "0x9d6fcd20691664e12e96a80a70cc81aba11714c975e5e4accd74554b5d8fcd5e",
    "signature": "0x886389d66edba2b8c760096a6a123691b718323fbedf095108fbac9dccf3141d2d4051f05c5879c5c5e1bca19dde36937194ca35fb5892842c251be0682df0171c",
    "signer": "0xB755CddA6da08Cbad290b9528CD0dC860f9f7dd5",
    "userId": "536791428"
  }
}