{
  "manageEntity": {
    "action": "Save",
    "entityId": "1707973827",
    "entityType": "Track",
    "nonce": "0x217abb36607cf44a45af36de773c6cf3dc90a61d01fabb024a07a7c4eec88627",
    "signature": "0x7718d9adc2814bd6cec19af630f3ec27487c628991992e98f84c9ac984899aa82b02b38fa0ad711e669aae299af1d878c8538914dc8c6ac7e500da293e4bcd361c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}