{
  "manageEntity": {
    "action": "Save",
    "entityId": "314915",
    "entityType": "Track",
    "nonce": "0x5d6d5cbb618bcd259622fcebdf1aa62f1de16d2f85c95d889bd81be6e74b33f7",
    "signature": "0x149b4bd6dd405b92420453042c94dbb9b013263563cf9e48e4b5cb97b8993e0f3de64668ef5a7930d2fad9fa5fb7104ce92529d81e528deb8cf32d30fd33f65e1c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}