{
  "manageEntity": {
    "action": "Save",
    "entityId": "883367942",
    "entityType": "Track",
    "nonce": "0x7e98b6f910f35d09cb3a86abc16dbc70d80b1dd4f5df92fdeaad393be3201fd9",
    "signature": "0x2ce19d23ee466a7e12eb7904930ece188aa02add7d80116d00e1f83117aaba276d4e4e29df948b8ad8272d43b49b33b485660804564bc9aa99850d1c162981c51b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}