{
  "manageEntity": {
    "action": "Save",
    "entityId": "312798872",
    "entityType": "Track",
    "nonce": "0x1a7f6eef2c7f14c7eb7bea693f16ad92e564c6740993b6ce16ff46ecf1c95fee",
    "signature": "0xd20b422835aeae17ca1433edcfb29152e78b5614fee3357617cd4ba12390327c6e7b749fde94174a8d74d7a2b6bc23dd76081bb35ac312d9b397a68c4c911c241b",
    "signer": "0x5A2b21D1d4240B0d6eC130512D4b578aec735125",
    "userId": "862976792"
  }
}