{
  "manageEntity": {
    "action": "Save",
    "entityId": "1142147373",
    "entityType": "Track",
    "nonce": "0x11cf47220cc0e55d696ffc16f688198c1fcdfdb7aa0dc6f4ba06a75b14ff3376",
    "signature": "0xe3a0c02498c4b2c8bf16cd1127dfaba4b921b10e4bea3cc84ff295157f51948f0444670ffc5df4f93b33bffc9681cce1911f5f5febf52845e41db8dc54e605d81c",
    "signer": "0xb2F02534d11E6A4fCA3BCBe6Bd6Ad1aA049462Ca",
    "userId": "818521868"
  }
}