{
  "manageEntity": {
    "action": "Save",
    "entityId": "886662797",
    "entityType": "Track",
    "nonce": "0xe1e2c0b10a76aee1072a844b6a1d4fc4d574c60acd1c76ac57a107e1b71a921b",
    "signature": "0x26e1347a5807410d50bec9b21d562755c24d8b578e313cfe3222b0e7e323e8b7092c93bcea2782e2e0d1aa9ba8cc88be0524a6b9b5816e91aa9f9a61c890b4ec1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}