{
  "manageEntity": {
    "action": "Save",
    "entityId": "122613",
    "entityType": "Track",
    "nonce": "0x5795f339d001f7698c98518aa2f62aa7132fb4cceaaa2cbb908f644bad5b2e1a",
    "signature": "0x4bcba820e98b0c0e6ed9692a232c5fd5f03fc12558bf680c7b9a4815390f4e70273f8b7359dda83699946f14004a5f667e3e069c86ee4166e3d7938cf2be619d1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}