{
  "manageEntity": {
    "action": "Save",
    "entityId": "250026",
    "entityType": "Track",
    "nonce": "0xb8905e6cf1c3e08be339407b1db2571d2ea7f7e46f3af7999972a22cc95c63d0",
    "signature": "0xdf384a9037dbcce2c0474e085f8ae58e7cb9f96376069c0e0f9da9baa3c7d46a691e7cb363c3a08eaf02a1d95f26c1587a7937c5a23a0e80f2bfd8f43a0ed3ad1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}