{
  "manageEntity": {
    "action": "Save",
    "entityId": "1043816255",
    "entityType": "Track",
    "nonce": "0xef15cbb38d8aa9c1fd24dd4a47987fb968c81f2adf8e319d923f55ec7f69e5c8",
    "signature": "0x7188427790b1d20f94a10123f3e11e1163ed54c94d2f9dc25f588778632046156bf68fffafdccda02e9788e2ec7057ea11e8802a7e63dac7deed929dcad104f41b",
    "signer": "0x90CBf7c9BBF688fd9Fa4029B96e1BC32b270cA24",
    "userId": "711459379"
  }
}