{
  "manageEntity": {
    "action": "Save",
    "entityId": "1480700685",
    "entityType": "Track",
    "nonce": "0xbef03b71e874bc1c2e0d1447f654cd9fc14bcedf14bc37ac7d2e19aeb74c328e",
    "signature": "0x7f16b065cde8b46fd3436da43803401207ea722fe1023dbebbd96235b664c1da175c8541a5613a99c6201ecb1949d3fe7ffee651527539875c964d2fae17ad6f1c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}